Bombarded with 'allow dropbox' notifications

I've started getting bombarded with notifications that 'Dropbox is trying to access the internet'.  I've ticked 'don't notify me again', checked that Dropbox is in all my allowed lists & I still can't stop it.  It's also happening with Adobe, although less often.  It's causing real problems because it's interfering with my online meetings & I'm tearing my hair out. I'm running Norton 360 on my Mac (High Sierra 10.13.6)